forked from OSchip/llvm-project
59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
//===--- FullExpr.cpp - C++ full expression class ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the FullExpr interface, to be used for type safe handling
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// of full expressions.
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//
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// Full expressions are described in C++ [intro.execution]p12.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/FullExpr.h"
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#include "clang/AST/Expr.h"
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#include "clang/AST/ExprCXX.h"
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#include "llvm/Support/AlignOf.h"
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using namespace clang;
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FullExpr FullExpr::Create(ASTContext &Context, Expr *SubExpr,
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CXXTemporary **Temporaries, unsigned NumTemporaries) {
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FullExpr E;
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if (!NumTemporaries) {
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E.SubExpr = SubExpr;
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return E;
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}
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unsigned Size = sizeof(FullExpr)
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+ sizeof(CXXTemporary *) * NumTemporaries;
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unsigned Align = llvm::AlignOf<ExprAndTemporaries>::Alignment;
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ExprAndTemporaries *ET =
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static_cast<ExprAndTemporaries *>(Context.Allocate(Size, Align));
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ET->SubExpr = SubExpr;
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std::copy(Temporaries, Temporaries + NumTemporaries, ET->temps_begin());
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return E;
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}
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void FullExpr::Destroy(ASTContext &Context) {
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if (Expr *E = SubExpr.dyn_cast<Expr *>()) {
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E->Destroy(Context);
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return;
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}
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ExprAndTemporaries *ET = SubExpr.get<ExprAndTemporaries *>();
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for (ExprAndTemporaries::temps_iterator i = ET->temps_begin(),
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e = ET->temps_end(); i != e; ++i)
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(*i)->Destroy(Context);
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Context.Deallocate(ET);
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}
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